100% Nylon Ultra-lightweight 35-liter roll-top dry sack is the ideal dry storage and organizing option for fast and light adventuring when backpacking, bike touring, or travelling Manufactured from bluesign-approved 30D Ultra-Sil Cordura ripstop nylon with a slippery finish for easy packing; 2,000mm waterhead (the higher the waterhead rating, the more waterproof the fabric) Reinforced waterproof seams are double-stitched, and tape sealed, with reinforced stitching at stress points; secure Hypalon roll-top closure; fabric is translucent for visibility of contents Low-profile, streamlined shape saves space, and oval base resists rolling; patent-pending field repair buckle can be replaced in seconds 35-liter dry bag measures 12.6 x 11.2 x 22.2 inches when closed, and weighs just 0.16 pounds; volume is 35 liters (with closure rolled three times)